Reverting 2753.

src/ia32/builtins-ia32.cc

Index: src/ia32/builtins-ia32.cc
===================================================================
--- src/ia32/builtins-ia32.cc	(revision 2753)
+++ src/ia32/builtins-ia32.cc	(working copy)
@@ -132,7 +132,7 @@
     // Make sure that the maximum heap object size will never cause us
     // problem here, because it is always greater than the maximum
     // instance size that can be represented in a byte.
-    ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
+    ASSERT(Heap::MaxObjectSizeInPagedSpace() >= (1 << kBitsPerByte));
     ExternalReference new_space_allocation_top =
         ExternalReference::new_space_allocation_top_address();
     __ mov(ebx, Operand::StaticVariable(new_space_allocation_top));